마이크로서비스에서는 완전 자동화를 달성하기 위해 초소한의 시동/종료 시간을 갖도록 애플리케이션의 크기를 가능한 한 작게 유지하는 것이 극단적으로 아주 중요하다. 이를 위해 마이크로서비스에서는 객체와 데이터의 지연 로딩lazy loading에 대해서도 고려해봐야 한다.
이 때 떠오른 단어는 Spring과 @Lazy이다.
스프링 빈 설정시 @Lazy 애노테이션만 달아주면 이 빈을 가져오는 시점에 생성하기 때문에 모든 빈을 처음 초기화시에 만들지 않는다.
그런데 약간의 의문사항이 있어서 테스트 해봤다... 구글링을 대충 해도 나오는 자료이지만 직접 해봤다.
등장 클래스
아래와 같이 3개의 클래스를 빈으로 등록했다. 패턴은 다 같고 First, Second, Third 만 바뀐다.
@Component
public class First {
@Autowired
private Second second;
public First() {
System.out.println("first class constructor");
}
public void go() {
System.out.println("Hello first!");
second.go();
}
}
테스트 코드는 아래와 같다.
public class LazyApplicationTests {
@Test
public void lazy() {
ApplicationContext context = new AnnotationConfigApplicationContext(LazyApplication.class);
System.out.println("call first.go()");
First first = context.getBean(First.class);
first.go();
}
}
일반적인 빈 설정
먼저 위와 같이 @Lazy를 사용하지 않는 일반 적인 설정이다. 후에 스프링 컨텍스트에서 First 인스턴스를 꺼내서 go() 메서드를 수행할 것이다.
예상한 대로 빈이 전부 생성 된 후(①) FIrst.go() 이후의 작업이 수행된다(②).
first class constructor
second class constructor
third class constructor
Spring context loaded call
first.go()
Hello first!
Hello second
Hello third!
하지만 좀 이상한 점이 있는데 예상은 Thrid → Second → First 순으로 생성될 줄 알았지만 반대로 생성된다. 생성자를 사용하지 않고 @Autowired나 세터setter를 사용하면 스프링이 이 클래스를 까서(?) 적용을 하게 된다.
@Autowired를 사용하지 않고 생성자constructor를 사용하면 예상한 순서대로 빈이 만들어진다.
@Component
public class First {
private final Second second;
public First(Second second) {
this.second = second;
System.out.println("first class constructor");
}
public void go() {
System.out.println("Hello first!");
second.go();
}
}
third class constructor second class constructor first class constructor Spring context loaded call first.go() Hello first! Hello second Hello third!
Thrid, Second, Fourth 는 스프링 초기화시 생성되고 First는 지연 로딩이 적용된다.
third class constructor
second class constructor
fourth class constructor
Spring context loaded
call first.go()
first class constructor
Hello first!
Hello second
Hello third!
동시성 concurrency
First 빈이 생성 되는데 3초가 걸린다고 가정해보자.
@Component
@Lazy
public class First {
private final Second second;
public First(Second second) {
this.second = second;
// 인스턴스를 생성하는데 3초가 걸린다.
System.out.println("It takes 3 seconds to create an instance");
try {
for (int i = 0; i < 3; i++) {
System.out.println((3 - i) + "..");
Thread.sleep(1000);
}
} catch (InterruptedException e) {
System.out.println(e.getMessage());
}
System.out.println("first class constructor");
}
public void go() {
System.out.println("Hello first!");
second.go();
}
}
First 인스턴스를 사용하는 다른 인스턴스에서 동시에(거의 동시에?) 요청이 들어온다면?
테스트 코드는 아래와 같다.
@Test
public void concurrency() throws Exception {
ApplicationContext context = new AnnotationConfigApplicationContext(LazyApplication.class);
System.out.println("Spring context loaded");
for (int i = 0; i < 3; i++) {
Thread thread = new Thread(() -> {
System.out.println("call first.go()");
First first = context.getBean(First.class);
first.go();
});
thread.start();
System.out.println(thread.getName() + " started.");
Thread.sleep(100);
}
// 결과를 보기 위해 5초 대기
Thread.sleep(5000);
}
걱정과는 다르게 매우 잘 작동한다! 스프링 구욷!
third class constructor
second class constructor
fourth class constructor
Spring context loaded
Thread-2 started.
Thread-2 call first.go()
It takes 3 seconds to create an instance
3..
Thread-3 started.
Thread-3 call first.go()
Thread-4 started.
Thread-4 call first.go()
2..
1..
first class constructor
Thread-2 Hello first!
Thread-4 Hello first!
Thread-2 Hello second
Thread-4 Hello second
Thread-4 Hello third!
Thread-3 Hello first!
Thread-3 Hello second
Thread-3 Hello third!
Thread-2 Hello third!
Kotlin 1.3 이상을 사용하면서 스프링 부트 메인 클래스는 open 키워드를 넣어줘야 하는 가벼운(?) 이슈가 있었었다...
이번에는 spring-data + Mongodb를 공부하면서 다시 이 이슈가 등장하였다.
Kotlin + Spring 하면서 코틀린의 class 가 final로 되는 부분과 스프링에서 빈을 처리하기위해 클래스를 까발리는(?) 부분에서 문제가 생긴다. final class 는 조작이 안되기 때문에!?
> mvn spring-boot:run
[INFO] Scanning for projects...
[INFO]
[INFO] ---------------------< com.microservices:chapter5 >---------------------
[INFO] Building chapter5 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] >>> spring-boot-maven-plugin:2.1.5.RELEASE:run (default-cli) > test-compile @ chapter5 >>>
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ chapter5 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ chapter5 ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- kotlin-maven-plugin:1.3.31:compile (compile) @ chapter5 ---
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (compile) @ chapter5 ---
[INFO] Changes detected - recompiling the module!
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ chapter5 ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\dev\projects\kotlin-micro-service\chapter5\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ chapter5 ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:\dev\projects\kotlin-micro-service\chapter5\target\test-classes
[INFO]
[INFO] --- kotlin-maven-plugin:1.3.31:test-compile (test-compile) @ chapter5 ---
[WARNING] No sources found skipping Kotlin compile
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (testCompile) @ chapter5 ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:\dev\projects\kotlin-micro-service\chapter5\target\test-classes
[INFO]
[INFO] <<< spring-boot-maven-plugin:2.1.5.RELEASE:run (default-cli) < test-compile @ chapter5 <<<
[INFO]
[INFO]
[INFO] --- spring-boot-maven-plugin:2.1.5.RELEASE:run (default-cli) @ chapter5 ---
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.5.RELEASE)
0000-00-00 00:00:46.552 INFO 5708 --- [ main] c.m.chapter5.Chapter5ApplicationKt : Starting Chapter5ApplicationKt on ANTOP-GRAM with PID 5708 (D:\dev\projects\kotlin-micro-service\chapter5\target\classes started by antop in D:\dev\projects\kotlin-m
icro-service\chapter5)
0000-00-00 00:00:46.556 INFO 5708 --- [ main] c.m.chapter5.Chapter5ApplicationKt : No active profile set, falling back to default profiles: default
0000-00-00 00:00:46.739 WARN 5708 --- [kground-preinit] o.s.h.c.j.Jackson2ObjectMapperBuilder : For Jackson Kotlin classes support please add "com.fasterxml.jackson.module:jackson-module-kotlin" to the classpath
0000-00-00 00:00:47.090 INFO 5708 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
0000-00-00 00:00:47.126 INFO 5708 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 29ms. Found 0 repository interfaces.
0000-00-00 00:00:47.132 INFO 5708 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
0000-00-00 00:00:47.137 INFO 5708 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 4ms. Found 0 repository interfaces.
0000-00-00 00:00:48.799 INFO 5708 --- [ main] org.mongodb.driver.cluster : Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
0000-00-00 00:00:49.003 INFO 5708 --- [ main] org.mongodb.driver.cluster : Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
0000-00-00 00:00:49.056 INFO 5708 --- [localhost:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:2, serverValue:16}] to localhost:27017
0000-00-00 00:00:49.063 INFO 5708 --- [localhost:27017] org.mongodb.driver.cluster : Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=Server
Version{versionList=[4, 0, 9]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=4861938}
0000-00-00 00:00:49.491 INFO 5708 --- [localhost:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:1, serverValue:17}] to localhost:27017
0000-00-00 00:00:49.493 INFO 5708 --- [localhost:27017] org.mongodb.driver.cluster : Monitor thread successfully connected to server with description ServerDescription{address=localhost:27017, type=STANDALONE, state=CONNECTED, ok=true, version=Server
Version{versionList=[4, 0, 9]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=2452559}
0000-00-00 00:00:49.643 INFO 5708 --- [ntLoopGroup-2-2] org.mongodb.driver.connection : Opened connection [connectionId{localValue:3, serverValue:18}] to localhost:27017
0000-00-00 00:00:49.643 INFO 5708 --- [ntLoopGroup-2-3] org.mongodb.driver.connection : Opened connection [connectionId{localValue:4, serverValue:19}] to localhost:27017
0000-00-00 00:00:49.645 INFO 5708 --- [ntLoopGroup-2-4] org.mongodb.driver.connection : Opened connection [connectionId{localValue:5, serverValue:20}] to localhost:27017
0000-00-00 00:00:49.652 WARN 5708 --- [ main] onfigReactiveWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating be
an with name 'customerHandler' defined in file [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerHandler.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework
.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerServiceImpl': Unsatisfied dependency expressed through field 'customerRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean
with name 'customerRepository' defined in file [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerRepository.class]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigExcepti
on: Could not generate CGLIB subclass of class com.microservices.chapter5.CustomerRepository: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class com.m
icroservices.chapter5.CustomerRepository
0000-00-00 00:00:49.665 WARN 5708 --- [ntLoopGroup-2-3] org.mongodb.driver.connection : Got socket exception on connection [connectionId{localValue:4, serverValue:19}] to localhost:27017. All connections to localhost:27017 will be closed.
0000-00-00 00:00:49.665 WARN 5708 --- [ntLoopGroup-2-4] org.mongodb.driver.connection : Got socket exception on connection [connectionId{localValue:5, serverValue:20}] to localhost:27017. All connections to localhost:27017 will be closed.
0000-00-00 00:00:49.665 WARN 5708 --- [ntLoopGroup-2-2] org.mongodb.driver.connection : Got socket exception on connection [connectionId{localValue:3, serverValue:18}] to localhost:27017. All connections to localhost:27017 will be closed.
0000-00-00 00:00:49.672 ERROR 5708 --- [ntLoopGroup-2-2] org.mongodb.driver.connection : Callback onResult call produced an error
java.lang.IllegalStateException: state should be: open
at com.mongodb.assertions.Assertions.isTrue(Assertions.java:70) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer.invalidate(DefaultServer.java:125) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer.handleThrowable(DefaultServer.java:163) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer.access$600(DefaultServer.java:45) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer$DefaultServerProtocolExecutor$2.onResult(DefaultServer.java:223) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:49) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.CommandProtocolImpl$1.onResult(CommandProtocolImpl.java:83) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultConnectionPool$PooledConnection$1.onResult(DefaultConnectionPool.java:461) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.UsageTrackingInternalConnection$2.onResult(UsageTrackingInternalConnection.java:111) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:49) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$2$1.onResult(InternalStreamConnection.java:361) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$2$1.onResult(InternalStreamConnection.java:356) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback.onResult(InternalStreamConnection.java:603) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback.onResult(InternalStreamConnection.java:593) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$5.failed(InternalStreamConnection.java:500) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream.readAsync(NettyStream.java:232) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream.handleReadResponse(NettyStream.java:266) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream.access$600(NettyStream.java:66) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream$2$1.operationComplete(NettyStream.java:153) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream$2$1.operationComplete(NettyStream.java:150) [mongodb-driver-core-3.8.2.jar:na]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:502) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:476) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:415) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:540) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:529) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:101) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.DefaultChannelPromise.trySuccess(DefaultChannelPromise.java:84) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$CloseFuture.setClosed(AbstractChannel.java:1183) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.doClose0(AbstractChannel.java:769) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:745) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:616) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.NioEventLoop.closeAll(NioEventLoop.java:730) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:509) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:906) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191-1-ojdkbuild]
0000-00-00 00:00:49.672 ERROR 5708 --- [ntLoopGroup-2-3] org.mongodb.driver.connection : Callback onResult call produced an error
java.lang.IllegalStateException: state should be: open
at com.mongodb.assertions.Assertions.isTrue(Assertions.java:70) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer.invalidate(DefaultServer.java:125) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer.handleThrowable(DefaultServer.java:163) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer.access$600(DefaultServer.java:45) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer$DefaultServerProtocolExecutor$2.onResult(DefaultServer.java:223) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:49) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.CommandProtocolImpl$1.onResult(CommandProtocolImpl.java:83) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultConnectionPool$PooledConnection$1.onResult(DefaultConnectionPool.java:461) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.UsageTrackingInternalConnection$2.onResult(UsageTrackingInternalConnection.java:111) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:49) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$2$1.onResult(InternalStreamConnection.java:361) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$2$1.onResult(InternalStreamConnection.java:356) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback.onResult(InternalStreamConnection.java:603) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback.onResult(InternalStreamConnection.java:593) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$5.failed(InternalStreamConnection.java:500) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream.readAsync(NettyStream.java:232) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream.handleReadResponse(NettyStream.java:266) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream.access$600(NettyStream.java:66) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream$2$1.operationComplete(NettyStream.java:153) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream$2$1.operationComplete(NettyStream.java:150) [mongodb-driver-core-3.8.2.jar:na]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:502) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:476) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:415) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:540) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:529) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:101) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.DefaultChannelPromise.trySuccess(DefaultChannelPromise.java:84) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$CloseFuture.setClosed(AbstractChannel.java:1183) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.doClose0(AbstractChannel.java:769) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:745) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:616) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.NioEventLoop.closeAll(NioEventLoop.java:730) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:509) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:906) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191-1-ojdkbuild]
0000-00-00 00:00:49.672 ERROR 5708 --- [ntLoopGroup-2-4] org.mongodb.driver.connection : Callback onResult call produced an error
java.lang.IllegalStateException: state should be: open
at com.mongodb.assertions.Assertions.isTrue(Assertions.java:70) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer.invalidate(DefaultServer.java:125) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer.handleThrowable(DefaultServer.java:163) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer.access$600(DefaultServer.java:45) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultServer$DefaultServerProtocolExecutor$2.onResult(DefaultServer.java:223) ~[mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:49) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.CommandProtocolImpl$1.onResult(CommandProtocolImpl.java:83) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.DefaultConnectionPool$PooledConnection$1.onResult(DefaultConnectionPool.java:461) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.UsageTrackingInternalConnection$2.onResult(UsageTrackingInternalConnection.java:111) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.async.ErrorHandlingResultCallback.onResult(ErrorHandlingResultCallback.java:49) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$2$1.onResult(InternalStreamConnection.java:361) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$2$1.onResult(InternalStreamConnection.java:356) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback.onResult(InternalStreamConnection.java:603) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$MessageHeaderCallback.onResult(InternalStreamConnection.java:593) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.internal.connection.InternalStreamConnection$5.failed(InternalStreamConnection.java:500) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream.readAsync(NettyStream.java:232) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream.handleReadResponse(NettyStream.java:266) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream.access$600(NettyStream.java:66) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream$2$1.operationComplete(NettyStream.java:153) [mongodb-driver-core-3.8.2.jar:na]
at com.mongodb.connection.netty.NettyStream$2$1.operationComplete(NettyStream.java:150) [mongodb-driver-core-3.8.2.jar:na]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:502) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:476) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:415) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:540) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:529) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:101) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.DefaultChannelPromise.trySuccess(DefaultChannelPromise.java:84) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$CloseFuture.setClosed(AbstractChannel.java:1183) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.doClose0(AbstractChannel.java:769) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:745) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:616) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.NioEventLoop.closeAll(NioEventLoop.java:730) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:509) [netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:906) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.36.Final.jar:4.1.36.Final]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191-1-ojdkbuild]
0000-00-00 00:00:51.886 INFO 5708 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
0000-00-00 00:00:51.892 ERROR 5708 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerHandler' defined in file [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerHandler.class]: Unsatisfied dependency
expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerServiceImpl': Unsatisfied dependency expressed through field 'customerRepository'; nested except
ion is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository' defined in file [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerRepository.class]: Initialization of
bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class com.microservices.chapter5.CustomerRepository: Common causes of this problem include using a final class or a non-visible class; nested
exception is java.lang.IllegalArgumentException: Cannot subclass final class com.microservices.chapter5.CustomerRepository
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:769) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:218) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1341) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1187) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:843) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:67) ~[spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.5.RELEASE.jar:2.1.5.RELEASE]
at com.microservices.chapter5.Chapter5ApplicationKt.main(Chapter5Application.kt:12) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_191-1-ojdkbuild]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_191-1-ojdkbuild]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_191-1-ojdkbuild]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_191-1-ojdkbuild]
at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:558) [spring-boot-maven-plugin-2.1.5.RELEASE.jar:2.1.5.RELEASE]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_191-1-ojdkbuild]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerServiceImpl': Unsatisfied dependency expressed through field 'customerRepository'; nested exception is org.springframework.beans.factory.BeanCreation
Exception: Error creating bean with name 'customerRepository' defined in file [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerRepository.class]: Initialization of bean failed; nested exception is org.springframework.
aop.framework.AopConfigException: Could not generate CGLIB subclass of class com.microservices.chapter5.CustomerRepository: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Can
not subclass final class com.microservices.chapter5.CustomerRepository
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1248) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1168) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
... 25 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository' defined in file [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerRepository.class]: Initialization
of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class com.microservices.chapter5.CustomerRepository: Common causes of this problem include using a final class or a non-visible class; ne
sted exception is java.lang.IllegalArgumentException: Cannot subclass final class com.microservices.chapter5.CustomerRepository
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:601) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1248) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1168) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
... 39 common frames omitted
Caused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class com.microservices.chapter5.CustomerRepository: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lan
g.IllegalArgumentException: Cannot subclass final class com.microservices.chapter5.CustomerRepository
at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:208) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.aop.framework.AbstractAdvisingBeanPostProcessor.postProcessAfterInitialization(AbstractAdvisingBeanPostProcessor.java:92) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:429) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1782) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.1.7.RELEASE.jar:5.1.7.RELEASE]
... 48 common frames omitted
Caused by: java.lang.IllegalArgumentException: Cannot subclass final class com.microservices.chapter5.CustomerRepository
at org.springframework.cglib.proxy.Enhancer.generateClass(Enhancer.java:657) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$ClassLoaderAwareUndeclaredThrowableStrategy.generate(CglibAopProxy.java:1007) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:358) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:582) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:110) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:108) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_191-1-ojdkbuild]
at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:134) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:319) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:569) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:416) ~[spring-core-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.aop.framework.ObjenesisCglibAopProxy.createProxyClassAndInstance(ObjenesisCglibAopProxy.java:57) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:205) ~[spring-aop-5.1.7.RELEASE.jar:5.1.7.RELEASE]
... 53 common frames omitted
[WARNING]
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:558)
at java.lang.Thread.run (Thread.java:748)
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerHandler' defined in file [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerHandler.class]: Unsatisfied
dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerServiceImpl': Unsatisfied dependency expressed through field 'customerRepository'; ne
sted exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository' defined in file [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerRepository.class]: Initial
ization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class com.microservices.chapter5.CustomerRepository: Common causes of this problem include using a final class or a non-visible cl
ass; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class com.microservices.chapter5.CustomerRepository
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray (ConstructorResolver.java:769)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor (ConstructorResolver.java:218)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor (AbstractAutowireCapableBeanFactory.java:1341)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance (AbstractAutowireCapableBeanFactory.java:1187)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:555)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons (DefaultListableBeanFactory.java:843)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization (AbstractApplicationContext.java:877)
at org.springframework.context.support.AbstractApplicationContext.refresh (AbstractApplicationContext.java:549)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh (ReactiveWebServerApplicationContext.java:67)
at org.springframework.boot.SpringApplication.refresh (SpringApplication.java:775)
at org.springframework.boot.SpringApplication.refreshContext (SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:316)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:1260)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:1248)
at com.microservices.chapter5.Chapter5ApplicationKt.main (Chapter5Application.kt:12)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:558)
at java.lang.Thread.run (Thread.java:748)
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerServiceImpl': Unsatisfied dependency expressed through field 'customerRepository'; nested exception is org.springframework.beans.factory.BeanCreation
Exception: Error creating bean with name 'customerRepository' defined in file [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerRepository.class]: Initialization of bean failed; nested exception is org.springframework.
aop.framework.AopConfigException: Could not generate CGLIB subclass of class com.microservices.chapter5.CustomerRepository: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Can
not subclass final class com.microservices.chapter5.CustomerRepository
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject (AutowiredAnnotationBeanPostProcessor.java:596)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject (InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties (AutowiredAnnotationBeanPostProcessor.java:374)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean (AbstractAutowireCapableBeanFactory.java:1411)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:592)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate (DependencyDescriptor.java:277)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency (DefaultListableBeanFactory.java:1248)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency (DefaultListableBeanFactory.java:1168)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument (ConstructorResolver.java:857)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray (ConstructorResolver.java:760)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor (ConstructorResolver.java:218)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor (AbstractAutowireCapableBeanFactory.java:1341)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance (AbstractAutowireCapableBeanFactory.java:1187)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:555)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons (DefaultListableBeanFactory.java:843)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization (AbstractApplicationContext.java:877)
at org.springframework.context.support.AbstractApplicationContext.refresh (AbstractApplicationContext.java:549)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh (ReactiveWebServerApplicationContext.java:67)
at org.springframework.boot.SpringApplication.refresh (SpringApplication.java:775)
at org.springframework.boot.SpringApplication.refreshContext (SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:316)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:1260)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:1248)
at com.microservices.chapter5.Chapter5ApplicationKt.main (Chapter5Application.kt:12)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:558)
at java.lang.Thread.run (Thread.java:748)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository' defined in file [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerRepository.class]: Initialization
of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class com.microservices.chapter5.CustomerRepository: Common causes of this problem include using a final class or a non-visible class; ne
sted exception is java.lang.IllegalArgumentException: Cannot subclass final class com.microservices.chapter5.CustomerRepository
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:601)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate (DependencyDescriptor.java:277)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency (DefaultListableBeanFactory.java:1248)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency (DefaultListableBeanFactory.java:1168)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject (AutowiredAnnotationBeanPostProcessor.java:593)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject (InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties (AutowiredAnnotationBeanPostProcessor.java:374)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean (AbstractAutowireCapableBeanFactory.java:1411)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:592)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate (DependencyDescriptor.java:277)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency (DefaultListableBeanFactory.java:1248)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency (DefaultListableBeanFactory.java:1168)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument (ConstructorResolver.java:857)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray (ConstructorResolver.java:760)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor (ConstructorResolver.java:218)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor (AbstractAutowireCapableBeanFactory.java:1341)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance (AbstractAutowireCapableBeanFactory.java:1187)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:555)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons (DefaultListableBeanFactory.java:843)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization (AbstractApplicationContext.java:877)
at org.springframework.context.support.AbstractApplicationContext.refresh (AbstractApplicationContext.java:549)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh (ReactiveWebServerApplicationContext.java:67)
at org.springframework.boot.SpringApplication.refresh (SpringApplication.java:775)
at org.springframework.boot.SpringApplication.refreshContext (SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:316)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:1260)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:1248)
at com.microservices.chapter5.Chapter5ApplicationKt.main (Chapter5Application.kt:12)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:558)
at java.lang.Thread.run (Thread.java:748)
Caused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class com.microservices.chapter5.CustomerRepository: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lan
g.IllegalArgumentException: Cannot subclass final class com.microservices.chapter5.CustomerRepository
at org.springframework.aop.framework.CglibAopProxy.getProxy (CglibAopProxy.java:208)
at org.springframework.aop.framework.ProxyFactory.getProxy (ProxyFactory.java:110)
at org.springframework.aop.framework.AbstractAdvisingBeanPostProcessor.postProcessAfterInitialization (AbstractAdvisingBeanPostProcessor.java:92)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization (AbstractAutowireCapableBeanFactory.java:429)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean (AbstractAutowireCapableBeanFactory.java:1782)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:593)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate (DependencyDescriptor.java:277)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency (DefaultListableBeanFactory.java:1248)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency (DefaultListableBeanFactory.java:1168)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject (AutowiredAnnotationBeanPostProcessor.java:593)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject (InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties (AutowiredAnnotationBeanPostProcessor.java:374)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean (AbstractAutowireCapableBeanFactory.java:1411)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:592)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate (DependencyDescriptor.java:277)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency (DefaultListableBeanFactory.java:1248)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency (DefaultListableBeanFactory.java:1168)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument (ConstructorResolver.java:857)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray (ConstructorResolver.java:760)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor (ConstructorResolver.java:218)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor (AbstractAutowireCapableBeanFactory.java:1341)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance (AbstractAutowireCapableBeanFactory.java:1187)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:555)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons (DefaultListableBeanFactory.java:843)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization (AbstractApplicationContext.java:877)
at org.springframework.context.support.AbstractApplicationContext.refresh (AbstractApplicationContext.java:549)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh (ReactiveWebServerApplicationContext.java:67)
at org.springframework.boot.SpringApplication.refresh (SpringApplication.java:775)
at org.springframework.boot.SpringApplication.refreshContext (SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:316)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:1260)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:1248)
at com.microservices.chapter5.Chapter5ApplicationKt.main (Chapter5Application.kt:12)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:558)
at java.lang.Thread.run (Thread.java:748)
Caused by: java.lang.IllegalArgumentException: Cannot subclass final class com.microservices.chapter5.CustomerRepository
at org.springframework.cglib.proxy.Enhancer.generateClass (Enhancer.java:657)
at org.springframework.cglib.transform.TransformingClassGenerator.generateClass (TransformingClassGenerator.java:33)
at org.springframework.cglib.core.DefaultGeneratorStrategy.generate (DefaultGeneratorStrategy.java:25)
at org.springframework.aop.framework.CglibAopProxy$ClassLoaderAwareUndeclaredThrowableStrategy.generate (CglibAopProxy.java:1007)
at org.springframework.cglib.core.AbstractClassGenerator.generate (AbstractClassGenerator.java:358)
at org.springframework.cglib.proxy.Enhancer.generate (Enhancer.java:582)
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply (AbstractClassGenerator.java:110)
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply (AbstractClassGenerator.java:108)
at org.springframework.cglib.core.internal.LoadingCache$2.call (LoadingCache.java:54)
at java.util.concurrent.FutureTask.run (FutureTask.java:266)
at org.springframework.cglib.core.internal.LoadingCache.createEntry (LoadingCache.java:61)
at org.springframework.cglib.core.internal.LoadingCache.get (LoadingCache.java:34)
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get (AbstractClassGenerator.java:134)
at org.springframework.cglib.core.AbstractClassGenerator.create (AbstractClassGenerator.java:319)
at org.springframework.cglib.proxy.Enhancer.createHelper (Enhancer.java:569)
at org.springframework.cglib.proxy.Enhancer.createClass (Enhancer.java:416)
at org.springframework.aop.framework.ObjenesisCglibAopProxy.createProxyClassAndInstance (ObjenesisCglibAopProxy.java:57)
at org.springframework.aop.framework.CglibAopProxy.getProxy (CglibAopProxy.java:205)
at org.springframework.aop.framework.ProxyFactory.getProxy (ProxyFactory.java:110)
at org.springframework.aop.framework.AbstractAdvisingBeanPostProcessor.postProcessAfterInitialization (AbstractAdvisingBeanPostProcessor.java:92)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization (AbstractAutowireCapableBeanFactory.java:429)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean (AbstractAutowireCapableBeanFactory.java:1782)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:593)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate (DependencyDescriptor.java:277)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency (DefaultListableBeanFactory.java:1248)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency (DefaultListableBeanFactory.java:1168)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject (AutowiredAnnotationBeanPostProcessor.java:593)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject (InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties (AutowiredAnnotationBeanPostProcessor.java:374)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean (AbstractAutowireCapableBeanFactory.java:1411)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:592)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate (DependencyDescriptor.java:277)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency (DefaultListableBeanFactory.java:1248)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency (DefaultListableBeanFactory.java:1168)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument (ConstructorResolver.java:857)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray (ConstructorResolver.java:760)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor (ConstructorResolver.java:218)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor (AbstractAutowireCapableBeanFactory.java:1341)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance (AbstractAutowireCapableBeanFactory.java:1187)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean (AbstractAutowireCapableBeanFactory.java:555)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean (AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0 (AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton (DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean (AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean (AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons (DefaultListableBeanFactory.java:843)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization (AbstractApplicationContext.java:877)
at org.springframework.context.support.AbstractApplicationContext.refresh (AbstractApplicationContext.java:549)
at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh (ReactiveWebServerApplicationContext.java:67)
at org.springframework.boot.SpringApplication.refresh (SpringApplication.java:775)
at org.springframework.boot.SpringApplication.refreshContext (SpringApplication.java:397)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:316)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:1260)
at org.springframework.boot.SpringApplication.run (SpringApplication.java:1248)
at com.microservices.chapter5.Chapter5ApplicationKt.main (Chapter5Application.kt:12)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:558)
at java.lang.Thread.run (Thread.java:748)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 17.050 s
[INFO] Finished at: 2019-05-26T11:40:53+09:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.1.5.RELEASE:run (default-cli) on project chapter5: An exception occurred while running. null: InvocationTargetException: Error creating bean with name 'customerHandler' defined in fi
le [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerHandler.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyExceptio
n: Error creating bean with name 'customerServiceImpl': Unsatisfied dependency expressed through field 'customerRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository' defined in f
ile [D:\dev\projects\kotlin-micro-service\chapter5\target\classes\com\microservices\chapter5\CustomerRepository.class]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of cla
ss com.microservices.chapter5.CustomerRepository: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class com.microservices.chapter5.CustomerRepository ->
[Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
이런다고 CustomerRepositroy 클리스에 open 을 달아주면?
@Repository
open class CustomerRepository(private val template: ReactiveMongoTemplate) {
}
런타임에 아래와 같이 NullPointException이 발생하게 된다.
java.lang.NullPointerException: null
at com.microservices.chapter5.CustomerRepository.findCustomer(CustomerRepository.kt:48) ~[classes/:na]
at com.microservices.chapter5.CustomerServiceImpl.searchCustomers(CustomerServiceImpl.kt:21) ~[classes/:na]
at com.microservices.chapter5.CustomerHandler.search(CustomerHandler.kt:32) ~[classes/:na]
at com.microservices.chapter5.CustomerRouter$customerRoutes$1$2$1.invoke(CustomerRouter.kt:17) ~[classes/:na]
at com.microservices.chapter5.CustomerRouter$customerRoutes$1$2$1.invoke(CustomerRouter.kt:8) ~[classes/:na]
at org.springframework.web.reactive.function.server.RouterFunctionDsl$GET$1.handle(RouterFunctionDsl.kt:158) ~[spring-webflux-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.reactive.function.server.support.HandlerFunctionAdapter.handle(HandlerFunctionAdapter.java:61) ~[spring-webflux-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.reactive.DispatcherHandler.invokeHandler(DispatcherHandler.java:166) ~[spring-webflux-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at org.springframework.web.reactive.DispatcherHandler.lambda$handle$1(DispatcherHandler.java:151) ~[spring-webflux-5.1.7.RELEASE.jar:5.1.7.RELEASE]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:118) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:275) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:849) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:204) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2066) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.request(FluxPeekFuseable.java:138) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:1874) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:1748) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onSubscribe(FluxPeekFuseable.java:172) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:74) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3710) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:75) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.Operators.complete(Operators.java:131) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoEmpty.subscribe(MonoEmpty.java:45) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoPeek.subscribe(MonoPeek.java:71) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoMap.subscribe(MonoMap.java:55) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3710) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:442) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:212) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.FluxConcatMap.subscribe(FluxConcatMap.java:121) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoNext.subscribe(MonoNext.java:40) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoSwitchIfEmpty.subscribe(MonoSwitchIfEmpty.java:44) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoFlatMap.subscribe(MonoFlatMap.java:60) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoOnErrorResume.subscribe(MonoOnErrorResume.java:44) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:3710) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:172) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoPeekFuseable.subscribe(MonoPeekFuseable.java:70) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.core.publisher.MonoPeekTerminal.subscribe(MonoPeekTerminal.java:61) ~[reactor-core-3.2.9.RELEASE.jar:3.2.9.RELEASE]
at reactor.netty.http.server.HttpServerHandle.onStateChange(HttpServerHandle.java:64) ~[reactor-netty-0.8.8.RELEASE.jar:0.8.8.RELEASE]
at reactor.netty.tcp.TcpServerBind$ChildObserver.onStateChange(TcpServerBind.java:226) ~[reactor-netty-0.8.8.RELEASE.jar:0.8.8.RELEASE]
at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:442) ~[reactor-netty-0.8.8.RELEASE.jar:0.8.8.RELEASE]
at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:91) ~[reactor-netty-0.8.8.RELEASE.jar:0.8.8.RELEASE]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:161) ~[reactor-netty-0.8.8.RELEASE.jar:0.8.8.RELEASE]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:438) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:323) ~[netty-codec-4.1.36.Final.jar:4.1.36.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:297) ~[netty-codec-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:253) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1408) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:930) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:682) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:617) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:534) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496) ~[netty-transport-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:906) ~[netty-common-4.1.36.Final.jar:4.1.36.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.36.Final.jar:4.1.36.Final]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_191-1-ojdkbuild]
일반적으로 스프링과 com.fasterxml.jackson를 사용하여 컨트롤러 메소드에서 @ResponseBody 어노테이션을 이용하면 알아서 객체가 JSON 으로 변환되어 나가게 된다.
@RequestMapping(value = "/file/list", method = RequestMethod.GET)
@ResponseBody
public ModelMap list() {
ModelMap mm = new ModelMap();
List<File> list = fileService.list();
mm.put("list", list);
return mm;
}
만약 변환해야 하는 객체가 아래와 같이 순환 참조[각주:1]되는 객체일 경우 JSON 으로 변환을 하다가 에러가 나게 된다.
아래 소스 코드와 같이 간단하게 돌려보면 아래와 같은 에러를 볼 수 있다.
import com.fasterxml.jackson.databind.ObjectMapper;
public class JacksonTest {
public static void main(String[] args) throws Exception {
A a = new A();
for (int i = 0; i < 10; i++) {
B b = new B();
b.setA(a);
a.addB(b);
}
ObjectMapper om = new ObjectMapper();
String json = om.writeValueAsString(a);
System.out.println(json);
}
}
A 객체의 bs 속성(List)을 보고 B 객체의 A 객체를 보고 다시 A 객체의 bs 속성을 보고 무한으로 반복 된다.
그러다가 최종적으로 java.lang.StackOverflowError 가 떨어지게 된다.
Solution
순환 참조를 하지 말아야 하는 속성에 @JsonBackReference 어노테이션을 달아주자.
import com.fasterxml.jackson.annotation.JsonBackReference;
public class B {
private String name = "B";
// 이거
@JsonBackReference
private A a;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public A getA() {
return a;
}
public void setA(A a) {
this.a = a;
}
}
logback.jmx.war
logback.jmx.zip
Web Map Tile Services for Spatial Data.pdf
